Methods for inhibiting fouling in fluid catalytic cracking units

Abstract

This invention relates to processes for inhibiting fouling in fluid catalytic cracking units. The processes comprise adding to the hydrocarbon being processed a polymer formation inhibiting amount of aminoethyl piperazine.

Having thus described the invention what we claim is: 
     
       1. A method for inhibiting the formation of polymers and the subsequent fouling equipment surfaces in a fluid catalytic cracking unit during the processing of hydrocarbon slurry streams at a temperature of 650° F. to 1000° F. comprising adding to said streams from about 5 to about 5000 parts per million parts of said stream of aminoethyl piperazine contained in an organic solvent and polybutynyl thiophosphoric acid ester. 
     
     
       2. The method as claimed in claim 1 wherein said aminoethyl piperazine is added in an amount from about 15 parts to about 200 parts per million parts of said hydrocarbon. 
     
     
       3. The method as claimed in claim 1 wherein said organic solvent is heavy aromatic naphtha.